CN114653189A - Air purification filter material without additional porous substrate - Google Patents

Air purification filter material without additional porous substrate Download PDF

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Publication number
CN114653189A
CN114653189A CN202111681428.3A CN202111681428A CN114653189A CN 114653189 A CN114653189 A CN 114653189A CN 202111681428 A CN202111681428 A CN 202111681428A CN 114653189 A CN114653189 A CN 114653189A
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parts
porous substrate
air purification
filter material
purification filter
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CN202111681428.3A
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Inventor
张世著
张连斌
石欣超
童宁军
金鹏翔
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Nanjing Zhongrun Nanotechnology Co ltd
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Nanjing Zhongrun Nanotechnology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/52—Hydrogen sulfide

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

An air purification filter material without an additional porous substrate comprises the following materials in parts by weight: comprises 100-105 parts of strong oxidant, 195-205 parts of water, 650-820 parts of cementing material and 0-120 parts of cementing material modification component with pore structure. The invention provides an aqueous solution and a cementing material which only use a strong oxidant, has simple production process, high performance stability and low cost, and is suitable for large-scale industrial production.

Description

Air purification filter material without additional porous substrate
Technical Field
The invention relates to an air purification material, in particular to an air purification filter material without an external porous substrate.
Background
In modern society, environmental protection can directly affect human survival. Environmental pollution brings many hidden dangers to human life health safety, people pay more and more attention to quality of life, especially in cities with serious air pollution, and an air purifier becomes a necessity for people to live. In the prior art, activated carbon plays an important role in the field of water filtration and air filtration due to loose, porous and strong adsorption performance. In the US patent US2967587 Process and Apparatus for Dry-Process addition of Hydrogen Sulfide from cake-oven Gases, activated carbon is used to oxidize Hydrogen Sulfide into elemental sulfur under aerobic conditions, thereby increasing the Adsorption capacity of activated carbon, and ammonia or silicic acid is added in the reaction for catalysis; in U.S. Pat. No. 3, 20150182945, 1 Dry-scavenging Media Compositions and Methods of Production and Use, activated alumina, magnesia and activated carbon are mixed in water and the mixture is extruded through a die to form a substrate or honeycomb structure having long open channels, which provides greatly improved adsorption efficiency while providing improved structural strength. However, since the adsorption mechanism of activated carbon is physical adsorption, toxic and harmful malodorous gases cannot be completely removed, and activated carbon is combustible and is not suitable for use as a base material in an oxidation reaction type chemical adsorption process that generates heat. Therefore, a harmful gas removing medium using a non-toxic and harmless porous material (such as activated alumina or the like) as a base material has been a major point of technical development.
The above prior art requires a large number of porous substrates and is relatively expensive to manufacture. The preparation process of the corresponding air purification filter material is complex, and the performance consistency of different production batches is poor.
Disclosure of Invention
The problems to be solved are as follows: aiming at the problems, the invention provides the aqueous solution and the cementing material which only use the strong oxidant, has simple production process, high performance stability and low cost, and is suitable for large-scale industrial production.
Technical scheme
An air purification filter material without an additional porous substrate comprises the following materials in parts by weight: comprises 100-105 parts of strong oxidant, 195-205 parts of water, 650-820 parts of cementing material and 0-120 parts of cementing material modification component with pore structure.
Further, the cementing material is cement.
Furthermore, the cement is selected from one or more of portland cement and aluminate cement. Preferably aluminate cement.
Furthermore, the modified component of the cementing material with a pore structure is one or more of light calcium carbonate, diatomite, silica fume and zeolite powder. The specific surface area of the cementing material modification component with a pore structure is more than or equal to 1m 2/g.
Furthermore, the strong oxidant is a water-soluble strong oxidant, and the water-soluble strong oxidant is sodium permanganate, potassium permanganate and sodium hypochlorite. Potassium permanganate is preferred.
Furthermore, the air purification filter material without the external porous substrate comprises a cementing material: 760 parts, potassium permanganate: 101.8 parts, water: 198 parts and 40 parts of silica fume.
And (3) cementing materials: 720 parts of potassium permanganate: 101.8 parts, water: 198 parts and 80 parts of silica fume. And (3) cementing materials: 680 parts, potassium permanganate: 101.8 parts, water: 198 parts and 120 parts of silica fume.
Has the advantages that:
the scheme provided by the invention only uses the aqueous solution of a strong oxidant and a cementing material, does not add a porous structure, has simple production process, high performance stability and low cost, and is suitable for large-scale industrial production. Under the condition of independently adding the cementing material cement, the compression resistance and the granulation ratio are good, the prior art is better, and the air purification effect is obviously improved after the silica fume and the diatomite are added. The cementing material, especially cement, in the scheme is low in price and easy to obtain, is widely applicable to building materials and has certain strength, and products obtained by the technical scheme can be widely applied to other occasions with large-area air purification requirements, such as factories and the like. Under the condition of ensuring the strength of the cementing material, the novel building material has the prospect of being a novel building material.
Detailed Description
Example 1
A preparation method of an air purification filter material without an additional porous substrate refers to the preparation method of example 7 in CN201910547521.1, a harmful gas removal medium and a preparation method thereof.
1) The modified ingredients of the cementing material with a pore structure are mixed with ordinary portland cement (specific variety: P.O 42.5.5) mixing completely with 800g powder mixer, and adding into granulating disc; the granulation disk was tilted at 30 ℃ and rotated at 40rpm, while 300ml (369g) of a 27.6% strength by weight aqueous sodium permanganate solution was sprayed onto the mixture; the sodium permanganate solution is sprayed by a metering pump at the speed of 20 ml/min;
2) stopping disc granulation and spraying when the diameter of the mixture becomes 4-6 mm, and taking out the particles;
3) weighing the granulated particles and calculating a granulation ratio;
4) standing the particles obtained in the step at room temperature for 12h, and curing at a high temperature of 110 ℃ for 1.8h until the water content of the solid particles is 17%, thus obtaining a medium for removing harmful gas containing 10 wt% of sodium permanganate;
5) for the granules obtained in the step 4), the compression strength of the granules (unit: n/pellet) was tested, and the value of the compressive strength was an average of 20 pellet compressive tests of this example.
Examples 2 to 13
In addition, by the method of example 1, the gel modification component having a pore structure (hereinafter referred to as a modification component) was added in examples 2 to 13, and the component ratio (the total weight ratio of the modification component to the gel and the modification component) was different, and specific example information is shown in table-1.
Wherein the modified components adopt light calcium carbonate, diatomite, silica fume and zeolite powder which are all 400 meshes.
TABLE-1 detailed example information
Figure BDA0003449943570000041
Figure BDA0003449943570000051
The granulation ratios and pellet compression strengths of the examples are shown in tables-2 and-3, respectively.
TABLE-2 granulation ratios of the examples
Examples Raw material weight (g) Granulation weight (g) Granulation ratio (%)
Example 1 1169 984 84.2
Example 2 1169 967 82.7
Example 3 1169 960 82.1
Example 4 1169 956 81.8
Example 5 1169 945 80.9
Example 6 1169 940 80.4
Example 7 1169 936 80.1
Example 8 1169 989 84.6
Example 9 1169 1004 85.9
Example 10 1169 1007 86.1
Example 11 1169 944 80.8
Example 12 1169 941 80.5
Practice ofExample 13 1169 939 80.3
TABLE-3 compression Strength of the granules for the respective experimental groups
Examples Compressive Strength (N/grain)
Example 1 48.7
Example 2 50.2
Example 3 52.1
Example 4 46.6
Example 5 40.8
Example 6 44.3
Example 7 38.9
Example 8 51.3
Example 9 53.0
Example 10 53.6
Example 11 41.0
Example 12 43.9
Example 13 39.7
The calcium carbonate and the silica fume have filling effect on common portland cement, and the compactness of the cement is improved, so that the compressive strength of the particles is improved; and the silica fume can also react with calcium hydroxide generated by cement hydration to generate hydrated calcium silicate (C-S-H) for gelation, so that the strength and viscosity of the cement are further improved, and the compression strength and granulation proportion of the granules are improved.
The diatomite and the zeolite powder have large porosity and large specific surface area, and can cause the porosity of the cement to be increased when being used as a modification component of the common portland cement, thereby reducing the compressive strength of the particles.
As can be seen from the above, the addition amount of the cement modifying component having a pore structure is preferably 5 wt%, 10 wt% and 15 wt% of silica fume, and the optimum proportion of the silica fume addition amount is 15 wt%. The proportion is the total weight ratio of the modifying component to the cementing material and the modifying component. The cost proportion corresponding to the embodiment is as follows:
example 8: and (3) cementing materials: 760 parts, potassium permanganate: 101.8 parts, water: 198 parts and 40 parts of silica fume.
Example 9: and (3) cementing materials: 720 parts of potassium permanganate: 101.8 parts, water: 198 parts and 80 parts of silica fume. Example 10: : and (3) cementing materials: 680 parts, potassium permanganate: 101.8 parts, water: 198 parts and 120 parts of silica fume.
Example 14
Example 14 was prepared by a method in which 800g of 400 mesh silica fume (15 wt%) and 85 wt% of aluminate cement (CA-50) were used as materials. The granulation ratio and the pellet compression strength of example 14 are shown in tables-4 and-5, respectively.
TABLE-4 granulation ratio of example 14
Examples Raw material weight (g) Granulation weight (g) Granulation ratio (%)
Example 14 1169 1009 86.3
TABLE-5 compression Strength of the granules of example 14
Examples Compressive Strength (N/grain)
Example 14 53.8
Performance comparison section
The Odoroxidant SP filter material of Purafil company in America is used as a comparative example, the filter material is one of permanganate filter materials with the best purification effect in the market, and the content of permanganate in the filter material is measured to be 16% by adopting elemental analysis. The standard accelerated test method for measuring the capacity of the harmful gas removal medium is adopted in Chinese patent CN200380104041.5 high-capacity solid filter medium, and comprises the following steps:
testing of the filter media typically takes a relatively long time to obtain results due to the low concentration of contaminated air supply, and the following method provides an accelerated test of the media adsorption capacity, i.e., the media is tested by exposure to high concentrations of contaminated gas.
Taking the hydrogen sulfide adsorption experiment as an example, the test process is carried out in a flow system. A known volume of media was placed in an adsorption tube and exposed to a known concentration of 1 vol.% of contaminant gas in a conditioned, humidified, clean air system. The gas flow was calibrated to provide a total flow rate of 1450 ± 20 ml/min. For air flow per liter per minute, each filter bed should contain at least 300ml of media. The removal capacity is calculated as the amount of contaminants (grams) removed per volume (cubic centimeters) of air flow at 50 parts per million (ppm) of permeance.
The sorbent tube filled with media should be arranged so that the mixed gas of air and hydrogen sulfide enters from the bottom of the tube, flows through the glass wool or beads, flows through the filter media, and is then analyzed by a gas analyzer. Before starting the analysis of the sample, leaks in the gas system should be checked and excluded. Once ready in place, the flow of mixed gas was started and the time was recorded until 50ppm breakthrough was observed by the gas analyzer and the time was recorded again. It is preferred to use a gas analyzer with variable range readings, with specific or multiple gas capabilities. The data from the above analysis will yield the gas capacity of the measured medium using the following equation:
gas capacity (GM/CC) K10-5×C×F×T/V
Wherein for H2S, constant K1.52; c is the concentration of the feed gas in the air stream, vol.%; f is total flow, cc/min; t is the time to reach 50ppm, min; v is the volume of the adsorption tube medium column, cc (cm)3). The gas analyzer used in the invention is a fixed five-in-one gas detection alarm MIC-600. The test results are shown in Table-6.
TABLE-6 test results of the harmful gas removal Medium test group
Numbering Sodium permanganate content (wt%) Adsorption capacity (10)-3g/cm3)
Example 8 10 10.1
Example 9 10 10.3
Example 10 10 10.6
Example 11 10 10.4
Comparative example 16 9.5
As can be seen from the above table, the air purification effect obtained by the technical scheme of the invention is greatly improved compared with the prior art.

Claims (9)

1. The air purification filter material without the additional porous substrate is characterized by comprising the following materials in parts by weight: comprises 100-105 parts of strong oxidant, 195-205 parts of water, 650-820 parts of cementing material and 0-120 parts of cementing material modification component with pore structure.
2. The air purification filter material without an additional porous substrate as claimed in claim 1, wherein the gelling material is cement.
3. The air purifying filter material without an additional porous substrate as claimed in claim 2, wherein the cement is selected from one or more of portland cement and aluminate cement.
4. The air purification filter material without an additional porous substrate as claimed in claim 2, wherein the specific surface area of the modified component of the cementitious material with a pore structure is not less than 1m2/g。
5. The air purification filter material without an additional porous substrate as claimed in claim 1, wherein the modified component of the cementing material with a pore structure is one or more of light calcium carbonate, diatomite, silica fume and zeolite powder.
6. The air purification filter material without an additional porous substrate as claimed in claim 1, wherein the strong oxidant is a water-soluble strong oxidant, and the water-soluble strong oxidant is sodium permanganate, potassium permanganate, or sodium hypochlorite.
7. The air purification filter material without an additional porous substrate as recited in claim 1, comprising the following components in parts by weight: and (3) cementing materials: 760 parts, potassium permanganate: 101.8 parts of water: 198 parts and 40 parts of silica fume.
8. The air purification filter material without an additional porous substrate as recited in claim 1, comprising the following components in parts by weight: and (3) cementing materials: 720 parts of potassium permanganate: 101.8 parts, water: 198 parts and 80 parts of silica fume.
9. The air purification filter material without an additional porous substrate as claimed in claim 1, which is characterized by comprising the following components in parts by weight: and (3) cementing materials: 680 parts, potassium permanganate: 101.8 parts, water: 198 parts and 120 parts of silica fume.
CN202111681428.3A 2021-12-31 2021-12-31 Air purification filter material without additional porous substrate Withdrawn CN114653189A (en)

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Application publication date: 20220624